Discontinued Operations (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Oct. 31, 2012	Oct. 31, 2011
Summary financial data of discontinued operations
Revenues		$ 45,796
Income before income taxes		2,609
Net income		$ 1,015

Overall income (loss) from a disposal group that is classified as a component of the entity, before income tax, reported as a separate component of income before extraordinary items. Includes the following (before income tax): income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal.

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After tax income (loss) from operations of a business component (exclusive of any gain (loss) on disposal, or provision therefore) during the reporting period, until its disposal.

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